Union Metrics

In their own words

Union Metrics makes social analytics software and is the company behind TweetReach and Union Metrics for Tumblr.

Launched in 2009, TweetReach is a social analytics tool that provides detailed earned media metrics. It’s a dead simple way to measure how many accounts received your tweets, how far your message has traveled, and who is influencing the conversation about your brand, campaign, event or product. Thousands of social marketers, event producers, and agencies use TweetReach to measure the response, engagement and effectiveness of their campaigns.